
onconnect = function(e) {
  var port = e.ports[0];
  port.start()
  port.onmessage = function(e) {
    var workerResult = 'Result: ' + e.data;
    port.postMessage(workerResult);
  }

  /*setTimeout(function(){
  	self.close() //在worker内部自动终结.
  },2000)*/

}